1620 Geographos (1951 RA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3355121545 ± 2.00e+00
Semi-major axis (a)1.2457769668 AU ± 3.00e+00
Inclination (i)13.33577542° ± 4.00e+00
Long. of Asc. Node (Ω)337.14082621° ± 5.00e+00
Arg. of Perihelion (ω)277.01835526° ± 6.00e+00
Mean Anomaly (M)212.92032873° ± 2.36e-05
Mean Motion (n)0.7088458984°/day ± 2.56e+00
Perihelion dist (q)0.82780365 AU ± 3.19e+00
Aphelion dist (Q)1.66375028 AU ± 4.72e+00
Orbital Period1.39046623 yr ± 5.02e+00
NGA Modelr2
A23.55475120e-06 AU/d²
Physical Parameters
H (abs. magnitude)15.26
G (slope)0.15
Alternative Designations

1983 CY3

Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.276″
Uncertainty0
Orbit TypeApollo
MOID0.028806 AU
Observations Used9056
Radar Obs Used5
Gaia Obs Used104
Oppositions19
Arc Total1951-2017
First Observation Used1951-08-31
Last Observation Used2026-04-08
Observations (11927)
Date Type RA Dec Mag Band Observatory
2021-12-10 02:23:54 s 1 -13787.997 0 +388406.36 9990.0 C57
2021-12-10 02:33:55 S 11 55 48.096 +09 11 24.43 V C57
2021-12-10 02:33:55 s 1 -14137.372 0 +388362.80 4750.0 C57
2021-12-10 02:43:54 S 11 55 49.615 +09 11 15.58 V C57
2021-12-10 02:43:54 s 1 -14486.718 0 +388318.29 9170.0 C57
2021-12-10 03:53:54 S 11 55 56.882 +09 10 09.44 V C57
2021-12-10 03:53:54 s 1 -16931.246 0 +387980.49 690.0 C57
2021-12-10 04:03:55 S 11 55 58.258 +09 09 58.25 V C57
2021-12-10 04:03:55 s 1 -17280.326 0 +387928.47 2380.0 C57
2021-12-10 04:13:54 S 11 55 59.369 +09 09 52.34 V C57
2021-12-10 04:13:54 s 1 -17629.369 0 +387875.52 3700.0 C57
2021-12-10 04:23:55 S 11 56 00.206 +09 09 43.27 V C57
2021-12-10 04:23:55 s 1 -17978.374 0 +387821.63 4660.0 C57
2021-12-10 04:33:55 S 11 56 01.274 +09 09 31.25 V C57
2021-12-10 04:33:55 s 1 -18327.341 0 +387766.80 5250.0 C57
2021-12-10 04:43:55 S 11 56 02.369 +09 09 21.20 V C57
2021-12-10 04:43:55 s 1 -18676.267 0 +387711.03 5470.0 C57
2021-12-10 04:53:55 S 11 56 03.552 +09 09 12.89 V C57
2021-12-10 04:53:55 s 1 -19025.153 0 +387654.33 5320.0 C57
2021-12-10 05:03:54 S 11 56 04.668 +09 09 03.35 V C57
2021-12-10 05:03:54 s 1 -19373.998 0 +387596.68 4790.0 C57
2021-12-10 05:13:55 S 11 56 05.808 +09 08 50.32 V C57
2021-12-10 05:13:55 s 1 -19722.801 0 +387538.09 3890.0 C57
2021-12-10 06:23:55 S 11 56 13.601 +09 07 43.61 V C57
2021-12-10 06:23:55 s 1 -22163.160 0 +387101.66 6540.0 C57
2021-12-10 06:33:54 S 11 56 14.549 +09 07 37.67 V C57
2021-12-10 06:33:54 s 1 -22511.592 0 +387035.55 2440.0 C57
2021-12-10 06:43:55 S 11 56 15.562 +09 07 29.82 V C57
2021-12-10 06:43:55 s 1 -22859.975 0 +386968.50 7940.0 C57
2021-12-10 06:53:54 S 11 56 16.486 +09 07 17.98 V C57
2021-12-10 06:53:54 s 1 -23208.306 0 +386900.51 3010.0 C57
2021-12-10 07:03:55 S 11 56 17.695 +09 07 05.41 V C57
2021-12-10 07:03:55 s 1 -23556.586 0 +386831.58 7670.0 C57
2021-12-10 07:13:54 S 11 56 18.847 +09 06 59.90 V C57
2021-12-10 07:13:54 s 1 -23904.813 0 +386761.71 1900.0 C57
2021-12-10 07:23:55 S 11 56 19.795 +09 06 49.97 V C57
2021-12-10 07:23:55 s 1 -24252.986 0 +386690.90 5700.0 C57
2021-12-10 07:33:55 S 11 56 20.885 +09 06 38.56 V C57
2021-12-10 07:33:55 s 1 -24601.105 0 +386619.14 9060.0 C57
2021-12-10 07:43:54 S 11 56 22.128 +09 06 30.42 V C57
2021-12-10 07:43:54 s 1 -24949.168 0 +386546.45 1990.0 C57
2021-12-10 07:53:55 S 11 56 22.824 +09 06 17.96 V C57
2021-12-10 07:53:55 s 1 -25297.175 0 +386472.81 4480.0 C57
2021-12-10 09:13:54 S 11 56 31.586 +09 05 07.58 V C57
2021-12-10 09:13:54 s 1 -28079.098 0 +385849.77 8090.0 C57
2021-12-10 09:23:55 S 11 56 33.084 +09 04 56.60 V C57
2021-12-10 09:23:55 s 1 -28426.559 0 +385767.65 6450.0 C57
2021-12-10 09:33:54 S 11 56 33.946 +09 04 45.70 V C57
2021-12-10 09:33:54 s 1 -28773.955 0 +385684.59 4330.0 C57
2021-12-10 09:43:55 S 11 56 34.985 +09 04 36.26 V C57
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1983-02-27 05:00:00 161795 5 Hz 2380 -1 -1
1983-02-27.208333 16179500 500 Hz 2380 251 251
1983-02-28 05:04:00 142007628 30 us 2380 -1 -1
1983-02-28.211111 14200762800 30000 us 2380 251 251
1994-08-28 07:10:00 38936537.06 1.76 us 8510 -14 -14
1994-08-28 07:10:00 -364880.593 0.9 Hz 8510 -14 -14
1994-08-28.298611 3893653706 1760 us 8510 253 253
1994-08-29 04:40:00 42596456.4 1.13 us 8510 -14 -14
1994-08-29 04:40:00 -427851.027 0.2 Hz 8510 -14 -14
1994-08-29.194444 4259645640 1130 us 8510 253 253
1994-09-02 07:20:00 -615553.2 0.5 Hz 8510 -14 -14
1994-09-02.305556 -61555320 50 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)